duncan



(No ModeLy 2 Sheets- Sheet 1, A J. DUNCAN.

MACHINE FOR SHEARING AND BENDING SHEET METAL. No. 357,187.

Patented Feb. 8, 1887.

- (No Model.) 2 Sheets-Sheet 2.

A.- J. DUNCAN.

MAGEENEEQE SHEARING AND BENDING SHEET METAL. No, 857,187. Patented Feb. 8, 1887.

'--:'"of metalmay be rapid] y cut and divided into Axonnw J. DUNCAN, or P MACHINE FOR SHEA PATENT Fries,

[TTSB I l Rf RING AND SENDING SHEET METAL,

SPECIFICATION forming part of Letters Patjent'filo. 357,187, dated Pebruary8, 1887.

Applirati: n filed Derembrr 4, 1934-.

To all whom, it may concern: Be it known that I, ANDREW J. DUNCAN, a citizen of the United States, and a resident of Pittsburg, in the county of Alleghenyand State of Pennsylvania, have invented a new and improved machine that by a single operation will cut, divide, and trim sheets ofmetal and bend the same intocylindrical form, of which thefollowingis a specification.

'lhe nature of my invention consists insncha construction, combination, and arrangement of parts comprised within a single machine as. that by their-con j oi nt action one or more sheets 1 i5 u tahly: z .niece h vingmarsha -edges," and maybe given aproper degree of cylindri -cal curvatu re as a preliminary step in. the manufacture ofvarious articles known to the art. For the purpose of enabling others to 'fully understand, make, and construct a machinein' accordance with my invention, I will proceed. to describeit by reference to the accompanying drawings, wherein Figure 1 represents that portion of'my improved machine wherein a numberof-beveh edged circular knives-or critters are arranged and fixed on separateparallel shafts and eachv made adjustable byfmeans of suitablecollars;

Fig. 2, a transverse vertical section of the en 0 tire machine Fig. 3,a perspective 'viewof adetached guide Fig. 4, an outside end of the machine; Fig. 5,-a front elevation .of the same; Fig. .6, a plan and transverse section of one of the circular beveledged knives or cutters; 5 Fig. 7, a front and edge View of one of thecollars or nuts used in supporting and securing the knives or cutters on their respective shafts, To put my invention into practice I erect a substantial frame, A, of suitable size and suffh 4.0 cientlystrong to sustain itself without vibra= tion-again'st the action of the various moving parts combined therewith: Along the entire i'ront of this frame A is placed and rigidly affixed thereto an inclined table, B, provid ed near its inner and lowermost edgewitli a lon- Tgitndinal slot,,, i,' running .nearly its" entire" length, and having beneath a downwardly-extending broad flange or vertical'rib, Q, aiso containing another slot, at, corresponding. with '50 theformer. Through the slot, 2' in the table B the crooked-arms b of the several guides g pass, each resting snugly against the face of Serial In). mime. N0 model.)

the broad flange beneath, where, by means of transverse bolts e and suitable thumb-screws, f, they are securely held 'in place, and maybe adjusted along said slots, whereby the guides gcan be'separated or brought near together ,'on top of the table B to suitdifferentwiiiths'of',

sheet metal, always preserving a parallelism. with each other in a direction corresponding with the line of feed. I I INear the lower edge o-t' the table B are a pair" of horizontal shafts, l) E, one abovethe other-,1 each having a screw-threw! cut thereon its en-' iire length, and provided with a number of bevel-edged circular knives, j, arranged in Pam,-mse.tha rzmh k lien ntlnneshaftshall be in close contact with its companion .k n-ife on the other shalt-,and in a condition-to read ily divide any thin sheet metal that may be directed between them. These several cutters or circular knives j are made adjustable on. their respective shafts, and prevented from turning thereon each by means of a jam-nut, Jr, embracing them on opposite sides, whereby the cutters may be set or gaged within reason. able limits to or from each other, so that sheets of metal may be cut and divided into strips of uniform or different widths.

Just behind the array of circular cutters j is placed and arrangeda downwardly-inclined platform, F, for receiving and conveying the freshly-cut sheets to and between apair of long, rolls, G H, of suitable diameter and proper distance apart, which are so geared together and to the aforesaid cutter-shafts DE, by means of connecting cog-wheels L M, as to rotate therewith and in a proper direction, power being applied through the-instrumentality of a belt operating in conjunction with a large pulley, N, on the outer end of one of them. Back of these rolls G H, and lengthwise oi the sam'e,

is a stout. rod, Z, rigidly secured to the sides of frame A, and provided with several deflectors, n, each consisting ofa block of metal having 5 receding curves that lead up and down, each corresponding to the approximate face of its nearest roll, and nearly in contact therewith. These several deflectors n areadjustable along the rod 1 by means of set-screws Z', and, if de- :00 sirable, the said rod may, by suitable means, 4 be adjustable outward from the rolls G H to' suit the formation of differentsized articles, On a line between each pair of cutters and e;-

tending back over the rolls (1- are arms 5-, that connect with a grooved bar, t, along the rear ot the machine. These curved arms are designed to serve as guides for the strips of metal sheared from the sheet, and they are rigidly. held against vibration by tongues formed on them entering-grooves in the rigidly-fixed bar I. By menus of setscrews I the arms are made laterally adjustable on their bar, for the purpose of adapting them to the lateral adjustments given to the cuttersj.

Attached to the main frame A are two aprons, m, one for each forming-roll, which aprons consist of a strong metallic sheet that extends from its fastened edge 1') to and rests upon the curved surface or periphery of its adjacent roll without being connected thereto.

The circular nuts 7:, that serve to hold and adjust each cutter j, are of different-sizes, those on the bevel-edged side of the cutter being the largest and of equal diameterthcrechine by a removal of the cutters with, while those on the opposite side are, smaller, whereby the blanks orshcets of metal undergoing the process of cutting, trimming, and dividing are prevented from clinging to the cutters or wed ging between them.

The feed-table I$,circular knives j, and forming-rolls G H arcarranged on the same general incline. which may be of any degree best suited for the purpose; and, if desirable, the machine can be used as an ordinary slitting or trimming machine by simply detaching the forming'rolls, or as an ordinary forming-mm or circular knives, the different parts being constructed to readily admit of such a change or removal.

Havin hus described in invent-ion I sides of the cutters shearing and bending with the frame 1. In a machine for sheet metal, the combination,

gulnr Intel-all Y adjust-able guides applied to said table, as described, the parallel-rot-ative screw-tln'caded shafts bearing circular cutters, and clampingnuts adjustable on said shafts, the inclined platform Ff. the rolls G H, the lateral ly-ndj ust-able deflectors Z, and the aprons or, fixed at their front ends and at their opposite ends impinging against the said rolls, all constructed and adapted to operate substantially in the manner and for the purposes described.

, 2. The combination, with the rotativescrcwshafts and circular beveled edge cutters, of clzmipingnutsk, those on the beveled-edge being of nearly equal diameter wit-h the cutters and those on the opposite sides of the cutters being smaller; as shown and described, whereby the sheets of metal while being out are prevented from wedgin r bet-ween or clinging tothe cutters, as specifieo. I

3. The combination, with the mainfunne, its inclined table and platform, and the circular laterally-adjustable cutters, of the rolls G H, the deflector n, aprons m m, and curved arms 8, secured to the groovcd'bar t, and adapted to serve as guides for the strips of me l while being bent, substantially as de- SClI .ed.

ANDREW J. DUNCAN.

Attcst: I

II. T. \IonRIs, M. E. HARRISON.

A and its inclined slotted table B, of the an- 

